Twenty-eight-year-old Elyse Mary Stern was riding her bike eastbound on Lake Street around 2:15 a.m. when she was struck by a Monte Carlo driven by 27-year-old Juan Ricardo Hernandez-Campoceco. Hernandez-Campoceco drove away from the scene but was arrested minutes later near East Franklin Avenue and Bloomington Avenue South. He had two passengers with him.

According to Minneapolis Police Department spokesman Bill Palmer, Hernandez-Campoceco showed "signs of intoxication" and was arrested on suspicion of DWI. He could be charged with criminal vehicular homicide this week. Here's Hernandez-Campoceco's mugshot:

Police say Stern wasn't wearing a helmet and had no lights on her bike. She was killed almost instantly -- Palmer said paramedics didn't even attempt to treat her when they arrived on the scene. Here's what her bike looked like after the accident:

Fox 9 screengrab

"I'm not blaming the victim here, but certainly one of the key ­lessons here is prevention," Palmer told reporters. "At 2 in the morning, you should take strong consideration of wearing a helmet... and take strong consideration of having lights on your bicycle."

The exact circumstances of the Saturday morning accident remain murky, but investigators are working to piece it together. Hernandez-Campoceco was apparently headed westbound on Lake when he struck Stern.

"We didn't know if it was a head-on, we have some information but we really need to wait for the reconstructionists to make a determination," Palmer said.